Propithecus coquereli.
The sifaka's first two infants did not survive long, but this one seems to be doing well. It was nearly 9 weeks old when I took this photo. Photography in this indoor enclosure is tricky, the quality of the glass is poor and the inside surface is often covered with condensation: I took this photo through a narrow gap beside the window frame, which was the only clear area.
That is a fantastic photo! My local zoo (Los Angeles) also has Coquerel's sifakas and I saw a mom and baby last summer. Unfortunately, the enclosure has wire mesh all around it (even double-layered in some parts), so it's impossible to get unobstructed photos.
